Chusetts



March 18 1924. 1,487,093

c. H. DRAPER SHUTTLE BOX TENSION CONTROLLING MECHANISM FOR LOOMS FiledAug. 23. 1922 III a" '7, III/ll WM wwvl Patented Mar. 18, 1924.

UNITED STATES PATENT OFFICE.

CLARE H. DRAPER, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO HOPEDALE MANU-FACTURING COMPANY, OF MILFORD, MASSACHUSETTS, A CORPORATION OF MASSA-CHUSETTS.

SHUTTLE-BOX TENSION-CONTROLLING MECHANISM FOR- LOOMS.

Application filed August 23, 1922.

To all whom it in gay concern.

Be it known that I, CLARE H. DRAPER, a citizen of the United States,residing at Hopedale, in the county of lVorcester and State ofMassachusetts, have invented certain new and useful Improvements in Shuttle-Box Tension-Controlling Mechanism for Looms; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The present invention relates to an imn'ovement in shuttle box tensioncontrolling mechanism for looms.

The object of the invention is to produce a construction for varying theresistance with which the shuttle is received in the shuttle box towhich it is thrown with the position of the lay. To the above ends thepresent invention consists in the shuttle box tension cont-rollingmechanism for looms hereinafter described and particularly defined inthe claims.

In the accompanying drawings illustrating the preferred form of theinvention, Fig. 1 is a perspective view of the end of a lay providedwith the invention; Fig. 2 is a longitudinal vertical section takenthrough the pivot of the binder; and Figs. 3 and 4 are diagramsillustrating the operation of the device.

The illustrated embodiment of the invention is described as follows: Thelay 1 is provided with the usual shuttle box, the box plate 2 of whichis shown. The picker stick 3 is supported in the lay in the usualmanner. The picker strap 4: embraces the picker stick. The binder 5 ispivoted on the lay, being normally pressed in a direction to cause it toengage the shuttle by the auxiliary binder spring 6. The pivot pin 7upon which the binder 5 is pivoted is provided with an eccentric portion8, which is received in a bushing in the binder. By turning the binderpivot pin '7 on its axis, the position of the eccentric portion 8 willbe changed, and therefore the position of the surface of the binder willbe'changed and the frictional resistance which the lay offers to theentrance of the shuttle to the box will be varied. The binder pin 7 ismounted in the lay so as to be capable of turning therein, the lay beingprovided with a bush- Serial No. 583,782.

ing 9 in which the pivot pin turns. The upper end of the pivot pin 7 hassecured to it a lever 10 which extends first rearwardly and thencetoward the frame of the loom where its end is received in the fork 11attached to the frame. Now, as the lay beats back and forth, the end0f.the pivot pin operating lever 10 being held in the fork frommovement, the pivot pin is turned and the eccentric 8 is turned, and.thereby the position of the surface of the binders vary with themovements of the lay so as thereby to increase the tension on thebinders as the lay beats toward the back center, and to de crease thesame as the lay beats forward. By reference to Figs. 3 and 4.- it willbe seen that with the lay in forward position the parts would occupy arelative position such as shown in Fig. 3, with the binder retracted,but that when the lay was on the back center the parts would occupy aposition like that shown in Fig. 4-, with the eccentric portion 8 movedforward so as to cause the binder to exert a greater pressure upon thshuttle. It is to be understood in this connection that the eccentricityof the eccentric portion 8 is accentuated in drawing by exaggeration forthe purpose of clearness of illustration. The arrangement is such thatthe surface of the binder at the pivot is moved forward slightly whenthe lay is in its rearinost position, so as to cause the binder toengage the shuttle with the greatest resistance on the back center, andwith less and less resistance as the lay moves forward.

The invention disclosed herein is broadly claimed in the application ofClare H. Draper filed July 11, 1922, Serial No. 574,212.

Having thus described the invention, what is claimed is:

1. Shuttle box tension controlling mechanism for looms having, incombination, a lay, a shuttle box carried by the lay and provided with abinder, an eccentric pivot for the binder, and means for oscillating thepivot with the beats of the lay to increase the pressure of th binder onthe lay as the lay moves rearwardly, and to decrease the same as the laymoves forwardly.

2. Shuttle box tension controlling mechanism for looms havin incombination, a.

lay, a shuttle box carried by the lay and provided with a binder pivotedat one end on the lay, and means for varying the position of the binderpivot during the operation of the loom to increase and decrease thepressure of the binder on the shuttle in accordance with the position ofthe lay.

3. Shuttle box tension controlling mechanism for looms having, incombination, a

lay, a shuttlebox. carried by the lay and provided with a binder pivotedat one end on the lay, and means for varying the position of the binderpivot during the operation of the loom to decrease the pressure of thebinder on the shuttle as the lay moves forwardly.

CLARE H. DRAPER.

